JP2692847B2 - Remote monitoring and control system - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a remote monitoring control system for remotely controlling a load.

2. Description of the Related Art Conventionally, this type of remote monitoring and control system connects a central control device, a plurality of monitoring terminals and control terminals with a pair of signal lines, and connects each terminal device from the central control device. In addition, the monitoring terminal returns monitoring data indicating the state of the operation switch from the monitoring terminal, and the control terminal accesses and transmits control data for controlling the load based on the monitoring data.

[Problems to be Solved by the Invention] However, in the above-described conventional example, there is a possibility that a malfunction occurs in which a load is inadvertently turned on and off due to an operation switch being operated by mistake or mischief. There was a problem.

The present invention has been made in view of the above points, and an object of the present invention is to stop the return of the reply signal from the monitoring terminal device to the central control device as necessary to prevent the load from being lost. It is to provide a remote monitoring control system that can be easily turned on and off.

[Means for Solving the Problems] A remote monitoring control system according to claim 1 of the present invention is a central control system in which a central controller is connected to a plurality of monitoring terminals and control terminals with a pair of signal lines. The device accesses each terminal device, the monitoring terminal device returns the monitoring data indicating the state of the operation switch, and the control data for controlling the load based on the monitoring data is accessed by the control terminal device and transmitted. In the remote monitoring control system, the transmission signal amplifying circuit, the reply signal amplifying circuit, the switch means for stopping the operation of the reply signal amplifying circuit, and the front side of the housing are provided. A reply stop unit having a pair of power supply connection terminal portion, input side signal line connection terminal portion and output side signal line connection terminal portion and having a board mounting hole formed on the side surface of the housing was inserted into the signal line. Things.

According to a second aspect of the present invention, the switch means of the reply stop unit is formed of a control terminal device for controlling the reply signal amplification circuit and a monitoring terminal device for monitoring the control switch.
The central control unit checks the state of the control switch to control the operation of the return signal amplifying circuit.

Furthermore, in the third aspect of the present invention, the reply stop unit is provided with reset means for resetting the interrupt request of the monitoring terminal device when the reply stop by the reply stop unit is completed.

[Operation] The present invention is configured as described above, and the remote monitoring control is such that the monitoring terminal and the controlling terminal are accessed from the central control device and the monitoring data and the control data are time-division multiplexed. In the system, a transmission signal amplifying circuit, a reply signal amplifying circuit, a switch means for stopping the operation of the reply signal amplifying circuit, and a pair of power supply connection terminals arranged on the front side of the housing. Section, the input side signal line connection terminal section and the output side signal line connection terminal section, and the reply stop unit having the board mounting hole formed on the side surface of the housing was inserted into the signal line, so that the center from the monitoring terminal device It is possible to stop the return of the reply signal to the control device as necessary to prevent the load from being turned on and off carelessly, and the terminal parts are provided on the front side of the reply stop unit. hand Runode, thereby improving workability when attaching the reply stop unit board. Also, the switch means of the reply stop unit is formed of a control terminal device for controlling the reply signal amplification circuit and a monitoring terminal device for monitoring the control switch, and the state of the control switch is checked from the central control unit. By controlling the operation of the reply signal amplification circuit,
It is convenient to be able to remotely control reply stop.

Furthermore, by providing the reply stop unit with reset means for resetting the interrupt request of the monitoring terminal device when the reply stop by the reply stop unit is completed,
It is possible to prevent a malfunction immediately after the reply is resumed.

[Embodiment] FIGS. 1 to 4 show an embodiment of the present invention, in which a central control unit 1, a plurality of monitoring terminals 2, 2 ′ and a control terminal 3 each having a unique address are set. Are connected by a pair of signal lines 4, and the transmission signal Vs sent from the central control device 1 to the signal line 4 is, as shown in FIG.
A start pulse signal ST indicating the start of signal transmission, a mode data signal MD indicating the signal mode, an address data signal AD for calling the terminals 2, 2 ', 3, a control data signal CD for controlling the load L, a checksum data signal CS and A multi-pole (±) consisting of a return standby signal WT that sets the return period from the terminals 2 and 3.
24V) time-division multiplexed signal, and data is transmitted by pulse width modulation. Each terminal 2, 2 ',
In 3, when the address data of the transmission signal Vs received via the signal line 4 and its own unique address data match, the control data of the transmission signal Vs is taken in and synchronized with the return standby signal WT of the transmission signal Vs. And the monitoring data signal is a current mode signal (a signal sent by short-circuiting the signal lines 4 via an appropriate low impedance) and a return signal V _B
As a return.

Also, to the central controller 1, dummy signal transmitting means for constantly transmitting the dummy transmission signal Vs in which the mode data signal MD is set to the dummy mode, and any one of the monitoring terminals 2, 2'returned to FIG. When an interrupt signal Vi as shown in (b) is received, an interrupt processing means for detecting the interrupt generating terminal device 2, 2 ', accessing the terminal device 2, 2', and returning the monitoring data is provided. ing. On the other hand, when there is a monitoring input by operating the operation switches S, S ', the monitoring terminals 2, 2'return the interrupt signal Vi in synchronization with the start pulse signal ST of the dummy transmission signal Vs. It sends back as a signal V _B, and an interrupt generating means for returning its own unique address data as return signal V _B in synchronism with the return wait signal WT of the transmission signal Vs of the address confirmation mode from the central control unit 1, a central control There is provided data returning means for returning the monitoring data corresponding to the monitoring input when the transmission signal Vs in the interrupt access mode in response to the interrupt is transmitted from the device 1. Further, in the central control device 1, the load L transmitted to the control terminal device 3 based on the monitoring data returned from the monitoring terminal devices 2, 2 ′ to the central control device 1.
Control data of the control terminal 3
To control the load L. In addition,
The switch monitoring terminals 2 and 2'for monitoring the states of the operation switches S and S'are provided with operation display lamps for displaying the operation state of the load L, and control data transmitted by the transmission signal Vs. The operation indicator lamp is controlled by.

As shown in FIG. 4, the reply stop unit 5 inserted into the signal line 4 has a pair of signal lines 4 on the central control unit 1 side when the reply stop unit 5 is inserted into the front side of the housing.
A pair of input side signal line terminal portions 16a, 16a for connecting
A pair of output side signal line connection terminal portions 16b, 16b for connecting a pair of signal lines 4 to which a monitoring terminal 2'which is further than the reply unit is connected, and a pair of power sources for connecting a commercial power source. Connection terminal portions 15, 15 and the like are arranged. Also,
The reply stop unit 5 has a board mounting hole 17 formed in the rear portion of both side surfaces of the housing. Here, as shown in FIG. 3, the reply stop unit 5 includes a transmission signal amplifier circuit 6
A response signal amplification circuit 7 and a control switch 8 for controlling the operation of the response signal amplification circuit 7. When the control switch 8 is turned on, the response signal amplification circuit 7 is operated and the control switch 8 is operated. When the switch is turned off, the operation of the reply signal amplification circuit 7 is stopped. Here, in the embodiment, the reply stopping unit 5 is provided with an interrupt resetting means composed of a timer circuit 9 for resetting the interrupt of the monitoring terminal device 2 when the reply stopping unit 5 stops the reply.

Hereinafter, the operation of the return stopping unit 5 of the embodiment will be specifically described. Now, when the control switch 8 of the reply stopping unit 5 is turned off, the operation of the reply signal amplifying circuit 7 is stopped, and the reply from the monitoring terminal 2 ′ farther than the reply stopping unit 5 to the central control unit 1 is returned. The return of signal V _B is stopped. Therefore, the load L does not malfunction even if the operation switch S ′ connected to the monitoring terminal 2 ′ farther than the reply stop unit 5 is operated. In this case, since the operation display lamps arranged in parallel with the operation switch S'perform normal operation, the switch monitoring terminal 2'operates as an operation display terminal of the load L. For example, when a certain load L can be controlled in parallel by the operation switch S connected to the monitoring terminal 2 and the operation switch S'connected to the monitoring terminal 2 ', the reply stop When the control switch 8 of the unit 5 is turned off and the return of the reply signal V _B is stopped, the switch monitoring terminal 2'cannot control the load L by the operation switch S ', but controls the operation display lamp. Since the transmission signal Vs for transmitting the control data to be received can be received, when the operation state of the load L is changed by the operation switch S of the other switch monitoring terminal 2, the operation display lamp is switched and the load L is changed.
The operation display of can be performed.

On the other hand, when the control switch 8 of the reply stop unit 5 is turned on, the reply signal amplifying circuit 7 operates to send the reply signal V _B back to the central control unit 1. The load L can be controlled by the operation switch S ′ farther than 5. By the way, if an interrupt is generated from the monitoring terminal device 2'remote while the reply is stopped, the load L may malfunction due to the interrupt request when the reply is restarted after the reply is stopped. Therefore, in the embodiment, when the control switch 8 is turned on, the timer circuit 9 is operated and the signal line 4 is short-circuited to notify the central controller 1 of the restart of the reply, and the central controller 1 requests an interrupt. An interrupt reset signal is sent to the device 2'to reset the interrupt to prevent the load L from malfunctioning immediately after the restart of the reply.

FIG. 5 and FIG. 6 show another embodiment, in which the switch means of the reply stop unit 5 is a monitoring terminal device for controlling the reply signal amplifying circuit 7 and the control switch 8. It is formed with the terminal device 11, and the state of the control switch 8 is checked from the central control unit 1 via the monitoring terminal device 11 and the operation of the return signal amplifying circuit 7 is controlled via the control terminal device 10. It is convenient because the reply stop can be controlled remotely.

FIG. 7 shows still another embodiment, in which the reset means of the reply stop unit 5 is formed by the pulse generation circuit 12, the signal processing circuit 13, and the transmission circuit 14, and the pulse is generated when the reply is resumed. Signal generation circuit by operating the generation circuit 12
By inputting to 13, the signal processing circuit 13 to the transmission circuit
An interrupt request reset signal is transmitted to the interrupt request terminal via 14 and the interrupt request reset is performed by the reply stop unit 5 to reduce the load on the central controller 1 and The central control unit 1 of the above can be used.

EFFECTS OF THE INVENTION The present invention is configured as described above, and remote monitoring is performed by accessing the monitoring terminal device and the control terminal device from the central control device to perform time-division multiplex transmission of monitoring data and control data. A control system, which includes a transmission signal amplification circuit, a reply signal amplification circuit, a switch means for stopping the operation of the reply signal amplification circuit, and a pair of power supply connections arranged on the front side of the housing. Since the reply stop unit having the terminal part, the input side signal line connection terminal part and the output side signal line connection terminal part and having the board mounting hole formed on the side surface of the housing was inserted into the signal line, There is an effect that it is possible to stop the reply signal from being sent back to the central control unit so as to prevent the load from being turned on and off carelessly, and the front side of the reply stop unit. Since the respective terminal portions are provided in the panel, there is an effect that the workability when the reply stop unit is attached to the panel is improved. Further, the switch means of the reply stop unit is formed of a control terminal device for controlling the reply signal amplification circuit and a monitoring terminal device for monitoring the control switch, and the central control unit checks the state of the control switch. By controlling the operation of the reply signal amplifying circuit, the reply stop can be remotely controlled, which is convenient.

Furthermore, by providing the reply stop unit with reset means for resetting the interrupt request of the monitoring terminal device when the reply stop by the reply stop unit is completed,
There is an effect that it is possible to prevent malfunctions immediately after the reply is resumed.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an embodiment of the present invention, FIG. 2 is an operation explanatory diagram of the same as above, FIG. 3 is a circuit diagram of essential parts of the same, FIG. 4 is a perspective view of essential parts of the same, and FIG. Circuit diagram of a main portion of another embodiment, sixth
FIG. 7 is a perspective view of the above, and FIG. 7 is a circuit diagram of a main part of still another embodiment. 1 is a central control device, 2 and 2'is a monitoring terminal device, 3 is a control terminal device, 4 is a signal line, 5 is a reply stop unit, 6 is a transmission signal amplifying circuit, 7 is a reply signal amplifying circuit, Reference numeral 8 is a control switch, 9 is a timer circuit, 10 is a control terminal, and 11 is a monitoring terminal.

Claims (3)

(57) [Claims] 1. A central control unit, a plurality of monitoring terminals and a control terminal are connected by a pair of signal lines, each terminal unit is accessed from the central control unit, and an operation switch is operated from the monitoring terminal unit. While sending back the monitoring data indicating the status,
A remote monitoring control system for transmitting control data for controlling a load based on the monitoring data by accessing a control terminal device, the transmission signal amplifying circuit, a reply signal amplifying circuit, and a reply signal. A housing provided with a switch means for freely stopping the operation of the amplifier circuit for power supply, a pair of power supply connection terminal portions, an input side signal line connection terminal portion, and an output side signal line connection terminal portion arranged on the front surface side of the housing. The remote monitoring and control system is characterized in that a reply stop unit having a panel mounting hole formed on the side surface of the is inserted into the signal line. 2. The switch means of the reply stop unit is composed of a control terminal device for controlling the reply signal amplification circuit and a monitoring terminal device for monitoring the control switch, and the state of the control switch is controlled from the central control unit. 2. The remote monitoring control system according to claim 1, wherein the operation is checked to control the operation of the return signal amplifying circuit. 3. The remote monitoring control system according to claim 1, wherein the reply stopping unit is provided with reset means for resetting the interrupt request of the monitoring terminal when the reply stopping by the reply stopping unit is completed.